Controls on winter ecosystem respiration in temperate and boreal ecosystems
Winter CO 2 fluxes represent an important component of the annual carbon budget in northern ecosystems. Understanding winter respiration processes and their responses to climate change is also central to our ability to assess terrestrial carbon cycle and climate feedbacks in the future. However, the...
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ftdoajarticles:oai:doaj.org/article:69e90165ffcc4f28be1707324116db63 2023-05-15T15:17:11+02:00 Controls on winter ecosystem respiration in temperate and boreal ecosystems T. Wang P. Ciais S. L. Piao C. Ottlé P. Brender F. Maignan A. Arain A. Cescatti D. Gianelle C. Gough L. Gu P. Lafleur T. Laurila B. Marcolla H. Margolis L. Montagnani E. Moors N. Saigusa T. Vesala G. Wohlfahrt C. Koven A. Black E. Dellwik A. Don D. Hollinger A. Knohl R. Monson J. Munger A. Suyker A. Varlagin S. Verma 2011-07-01T00:00:00Z https://doi.org/10.5194/bg-8-2009-2011 https://doaj.org/article/69e90165ffcc4f28be1707324116db63 EN eng Copernicus Publications http://www.biogeosciences.net/8/2009/2011/bg-8-2009-2011.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-8-2009-2011 1726-4170 1726-4189 https://doaj.org/article/69e90165ffcc4f28be1707324116db63 Biogeosciences, Vol 8, Iss 7, Pp 2009-2025 (2011) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2011 ftdoajarticles https://doi.org/10.5194/bg-8-2009-2011 2022-12-31T05:32:59Z Winter CO 2 fluxes represent an important component of the annual carbon budget in northern ecosystems. Understanding winter respiration processes and their responses to climate change is also central to our ability to assess terrestrial carbon cycle and climate feedbacks in the future. However, the factors influencing the spatial and temporal patterns of winter ecosystem respiration ( R eco ) of northern ecosystems are poorly understood. For this reason, we analyzed eddy covariance flux data from 57 ecosystem sites ranging from ~35° N to ~70° N. Deciduous forests were characterized by the highest winter R eco rates (0.90 ± 0.39 g C m −2 d −1 ), when winter is defined as the period during which daily air temperature remains below 0 °C. By contrast, arctic wetlands had the lowest winter R eco rates (0.02 ± 0.02 g C m −2 d −1 ). Mixed forests, evergreen needle-leaved forests, grasslands, croplands and boreal wetlands were characterized by intermediate winter R eco rates (g C m −2 d −1 ) of 0.70(±0.33), 0.60(±0.38), 0.62(±0.43), 0.49(±0.22) and 0.27(±0.08), respectively. Our cross site analysis showed that winter air ( T air ) and soil ( T soil ) temperature played a dominating role in determining the spatial patterns of winter R eco in both forest and managed ecosystems (grasslands and croplands). Besides temperature, the seasonal amplitude of the leaf area index (LAI), inferred from satellite observation, or growing season gross primary productivity, which we use here as a proxy for the amount of recent carbon available for R eco in the subsequent winter, played a marginal role in winter CO 2 emissions from forest ecosystems. We found that winter R eco sensitivity to temperature variation across space ( Q S ) was higher than the one over time (interannual, Q T ). This can be expected because Q S not only accounts for climate gradients across sites but also for (positively correlated) the spatial variability of substrate quantity. Thus, if the models estimate future warming impacts on R eco based on Q S rather ... Article in Journal/Newspaper Arctic Climate change Directory of Open Access Journals: DOAJ Articles Arctic Biogeosciences 8 7 2009 2025 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 T. Wang P. Ciais S. L. Piao C. Ottlé P. Brender F. Maignan A. Arain A. Cescatti D. Gianelle C. Gough L. Gu P. Lafleur T. Laurila B. Marcolla H. Margolis L. Montagnani E. Moors N. Saigusa T. Vesala G. Wohlfahrt C. Koven A. Black E. Dellwik A. Don D. Hollinger A. Knohl R. Monson J. Munger A. Suyker A. Varlagin S. Verma Controls on winter ecosystem respiration in temperate and boreal ecosystems |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Winter CO 2 fluxes represent an important component of the annual carbon budget in northern ecosystems. Understanding winter respiration processes and their responses to climate change is also central to our ability to assess terrestrial carbon cycle and climate feedbacks in the future. However, the factors influencing the spatial and temporal patterns of winter ecosystem respiration ( R eco ) of northern ecosystems are poorly understood. For this reason, we analyzed eddy covariance flux data from 57 ecosystem sites ranging from ~35° N to ~70° N. Deciduous forests were characterized by the highest winter R eco rates (0.90 ± 0.39 g C m −2 d −1 ), when winter is defined as the period during which daily air temperature remains below 0 °C. By contrast, arctic wetlands had the lowest winter R eco rates (0.02 ± 0.02 g C m −2 d −1 ). Mixed forests, evergreen needle-leaved forests, grasslands, croplands and boreal wetlands were characterized by intermediate winter R eco rates (g C m −2 d −1 ) of 0.70(±0.33), 0.60(±0.38), 0.62(±0.43), 0.49(±0.22) and 0.27(±0.08), respectively. Our cross site analysis showed that winter air ( T air ) and soil ( T soil ) temperature played a dominating role in determining the spatial patterns of winter R eco in both forest and managed ecosystems (grasslands and croplands). Besides temperature, the seasonal amplitude of the leaf area index (LAI), inferred from satellite observation, or growing season gross primary productivity, which we use here as a proxy for the amount of recent carbon available for R eco in the subsequent winter, played a marginal role in winter CO 2 emissions from forest ecosystems. We found that winter R eco sensitivity to temperature variation across space ( Q S ) was higher than the one over time (interannual, Q T ). This can be expected because Q S not only accounts for climate gradients across sites but also for (positively correlated) the spatial variability of substrate quantity. Thus, if the models estimate future warming impacts on R eco based on Q S rather ... |
format |
Article in Journal/Newspaper |
author |
T. Wang P. Ciais S. L. Piao C. Ottlé P. Brender F. Maignan A. Arain A. Cescatti D. Gianelle C. Gough L. Gu P. Lafleur T. Laurila B. Marcolla H. Margolis L. Montagnani E. Moors N. Saigusa T. Vesala G. Wohlfahrt C. Koven A. Black E. Dellwik A. Don D. Hollinger A. Knohl R. Monson J. Munger A. Suyker A. Varlagin S. Verma |
author_facet |
T. Wang P. Ciais S. L. Piao C. Ottlé P. Brender F. Maignan A. Arain A. Cescatti D. Gianelle C. Gough L. Gu P. Lafleur T. Laurila B. Marcolla H. Margolis L. Montagnani E. Moors N. Saigusa T. Vesala G. Wohlfahrt C. Koven A. Black E. Dellwik A. Don D. Hollinger A. Knohl R. Monson J. Munger A. Suyker A. Varlagin S. Verma |
author_sort |
T. Wang |
title |
Controls on winter ecosystem respiration in temperate and boreal ecosystems |
title_short |
Controls on winter ecosystem respiration in temperate and boreal ecosystems |
title_full |
Controls on winter ecosystem respiration in temperate and boreal ecosystems |
title_fullStr |
Controls on winter ecosystem respiration in temperate and boreal ecosystems |
title_full_unstemmed |
Controls on winter ecosystem respiration in temperate and boreal ecosystems |
title_sort |
controls on winter ecosystem respiration in temperate and boreal ecosystems |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/bg-8-2009-2011 https://doaj.org/article/69e90165ffcc4f28be1707324116db63 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_source |
Biogeosciences, Vol 8, Iss 7, Pp 2009-2025 (2011) |
op_relation |
http://www.biogeosciences.net/8/2009/2011/bg-8-2009-2011.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-8-2009-2011 1726-4170 1726-4189 https://doaj.org/article/69e90165ffcc4f28be1707324116db63 |
op_doi |
https://doi.org/10.5194/bg-8-2009-2011 |
container_title |
Biogeosciences |
container_volume |
8 |
container_issue |
7 |
container_start_page |
2009 |
op_container_end_page |
2025 |
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1766347454152704000 |